TK71724SCL/24 [TOKO]
LOW DROPOUT VOLTAGE REGULATOR; 低压差稳压器
| 型号： | TK71724SCL/24 |
| 厂家： | 
TOKO, INC |
| 描述： | LOW DROPOUT VOLTAGE REGULATOR |
| 文件： | 总13页 (文件大小：153K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TK717xxS
LOW DROPOUT VOLTAGE REGULATOR
APPLICATIONS
FEATURES
n BatteryPoweredSystems
n Very Good Stability (CL = 0.22 mF is Stable For
Any Type Capacitor withVOUT ³ 1.8 V)
n MeasurementSystems
n Built-in Shunt Circuit of Output to GND. The Stored
n MobileCommunicationsSystems
n Cordless Phone, PHS, GSM, CDMA
n IndustrialEquipment
Energy of the Output Capacitor is Discharged
Quickly
n Wide Operating Voltage Range (1.8 V ~ 14 V)
n PersonalComputers,BarcodeReaders
n Very Low Dropout Voltage (VDROP = 103 mV at
low quiescent current of 72 mA at no load and 0.8 mA with
a 50 mA load. The standby current is typically 100 pA. The
circuitfeaturesverygoodstability.Theripplerejectionis90
dB at 400 Hz and 80 dB at 1 kHz. Stable operation is
achieved with an output capacitor as low as 0.22 mF; a
capacitorofanytypemaybeused.(However,thelargerthe
outputcapacitoris,thebettertheoverallcharacteristicswill
be.)
100mA)
n Peak Output Current is 370 mA (0.3 V DROP Point)
n Very Low Quiescent Current (IQ = 72 uA at IOUT = 0 mA)
n Good Ripple Rejection Ratio (80 dB at 1 kHz)
n High Precision Output Voltage (± 1.5 % or ± 50 mV)
n Suitable for Very Low Noise Applications
n Built-in Active High On/Off Control (0.1 mA Max
StandbyCurrent)
TheTK717xxSisavailableinaverysmallSOT23-5surface
mountpackage.
n Built-in Short Circuit Protection
n Built-in Thermal Shutdown
n Very Small Surface Mount Package (SOT23-5)
TK717xxS
DESCRIPTION
V
IN
V
OUT
TK717xxS is a low dropout linear regulator with a built-in
electronic switch. The internal switch can be controlled by
TTL or CMOS logic levels. The device is in the ON state
whenthecontrolpinispulledtoalogichighlevel.IntheOFF
state, the output impedance becomes very low, quickly
dischargingtheoutputcapacitor.Anexternalcapacitorcan
be connected to the noise bypass pin to lower the output
noiselevelto30~50mVRMS.AninternalPNPpasstransistor
is included to achieve a low dropout voltage of 103 mV at
100 mA load current. The TK717xx has an exceptionally
GND
CONTROL
NOISE
BYPASS
BLOCKDIAGRAM
ORDERING INFORMATION
TK717
S L
V
OUT
V
IN
CONTROL CIRCUIT
Voltage Code
Package Code
Tape/Reel Code
CONTROL
CONSTANT
CURRENT
SOURCE
Operating Temp. Range
+
-
THERMAL &
OVER CURRENT
PROTECTION
BANDGAP
REFERENCE
VOLTAGE CODE
TAPE/REEL CODE
L: Tape Left
15 = 1.5 V 24 = 2.4 V 33 = 3.3 V 42 = 4.2 V
16 = 1.6 V 25 = 2.5 V 34 = 3.4 V 43 = 4.3 V
17 = 1.7 V 26 = 2.6 V 35 = 3.5 V 44 = 4.4 V
18 = 1.8 V 27 = 2.7 V 36 = 3.6 V 45 = 4.5 V
19 = 1.9 V 28 = 2.8 V 37 = 3.7 V 46 = 4.6 V
20 = 2.0 V 29 = 2.9 V 38 = 3.8 V 47 = 4.7 V
21 = 2.1 V 30 = 3.0 V 39 = 3.9 V 48 = 4.8 V
22 = 2.2 V 31 = 3.1 V 40 = 4.0 V 49 = 4.9 V
23 = 2.3 V 32 = 3.2 V 41 = 4.1 V 50 = 5.0 V
AUTO
DISCHARGE
CIRCUIT
OPERATING TEMP. RANGE
C: -30 ~ 80°C
NOISE
BYPASS
GND
PACKAGE CODE
S: SOT23-5
October 2001 TOKO, Inc.
Page1
TK717xxS
ABSOLUTE MAXIMUM RATINGS
SupplyVoltage............................................... -0.4 to16 V
PowerDissipation(Note1) ................................. 500mW
Reverse Bias Voltage ..................................... -0.4 to 6 V
OperatingVoltageRange ............................... 1.8 to 14 V
StorageTemperatureRange ..................... -55 to +150 °C
OperatingTemperatureRange..................... -30 to +80 °C
Noise Bypass Pin Voltage .............................. -0.4 to 5 V
Control Pin Voltage ....................................... -0.4 to 16 V
ShortCircuitCurrent............................................ 410 mA
TK717xxSCL ELECTRICAL CHARACTERISTICS
Test conditions: TA = 25 °C, unless otherwise specified.
SYMBOL
PARAMETER
Output Voltage
TEST CONDITIONS
MIN
TYP MAX
UNITS
VOUT
See Table 1
VIN = VOUT(TYP) + 1 V to VOUT(TYP) + 6 V, D V = 5 V
5 mA < IOUT < 100 mA, Note 2
5 mA < IOUT < 200 mA, Note 2
IOUT = 50 mA
Line Reg Line Regulation
Load Reg Load Regulation
0.3
8
5
mV
mV
24
27
61
mV
mV
mV
mV
mV
mA
mA
mA
VDROP
Dropout Voltage
(Note 5)
65
130
200
300
300
IOUT = 100 mA
103
163
163
370
250
72
I
OUT = 200 mA (2.4 V £ VOUT
)
IOUT = 180 mA (2.1 V £ VOUT < 2.4 V)
IOUT (MAX)
Maximum Output Current
When VOUT Down 0.3 V, Note 2
1.8 V £ VIN £ 2.1 V, Reference Value
IOUT = 0 mA Excluding ICONT
VCC = 8 V, VCONT £ 0.15 V, Off Mode
IOUT = 50 mA
280
IQ
Quiescent Current
Standby Current
GND Pin Current
Discharge Current
110
0.1
1.5
mA
ISTBY
IGND
Idis
0.0
0.8
29
mA
mA
mA
mA
mA
VREV = 2 V, Off Mode (71720)
13
23
25
27
VREV = 3 V, Off Mode (71730)
38
VREV = 4 V, Off Mode (71740)
VREV = 5 V, Off Mode (71750)
41
44
Page2
October 2001 TOKO, Inc.
TK717xxS
TK717xxSCL ELECTRICAL CHARACTERISTICS (CONT.)
Test conditions: TA = 25 °C, unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP MAX
UNITS
CONTROL TERMINAL SPECIFICATIONS (See Note 3 and 4)
ICONT
Control Current
VOUT = 1.8 V On State
On Mode
0.86
1.26
2.5
0.6
µA
V
VCONT(ON)
Control Voltage ON
1.6
VCONT(OFF) Control Voltage OFF
Off Mode
V
Noise Bypass Terminal
Voltage
VREF
V
DVOUT/DT
Temperature Coefficient
Reference Value
Reference Value
Typ = 25 ppm/°C
0.20 mV/ Ö Hz Typical at 1kHz
VNO
Output Noise
Note 1: Power dissipation is 150 mW in free air. Power dissipation is 500 mW when mounted as recommended. Derate at 4.0 mW/°C for operation
above 25°C.
Note 2: This value depends on the output voltage. This is a reference value for a 3 V output device.
Note 3: The input current decreases to the pA level by connecting the control terminal to GND.
Note 4: The pull-down resistor is not built-in.
Note 5: The minimum operating voltage for VIN can be 1.8 V. Also, the minimum voltage required for VIN is VIN = VDROP + VOUT. As a result, operating
at VOUT £ 2.0 V at the mimimum input operating voltage is not preferred.
General Note: The operation of -30 °C to 80 °C is guaranteed by design (verified by sample inspection).
General Note: Exceeding the “Absolute Maximum Rating “may damage the device.
General Note: Output noise is 0.20 mV/ ÖHz typical at 1 kHz: BW 400 to 30 kHz and 30 ~ 60 m Vrms.
General Note: Connecting a capacitor to the noise by pass pin will decrease the output noise voltage.
October 2001 TOKO, Inc.
Page3
TK717xxS
TK717xxSCL ELECTRICAL CHARACTERISTICS TABLE 1
Test Conditions: VIN = VOUT(TYP) + 1 V, IOUT = 5 mA, TA = 25 °C, unless otherwise specified.
OUTPUT VOLTAGE
TEST
OUTPUT VOLTAGE
VOUT
TEST
VOLTAGE
1.5 V
1.6 V
1.7 V
1.8 V
1.9 V
2.0 V
2.1 V
2.2 V
2.3 V
2.4 V
2.5 V
2.6 V
2.7 V
2.8 V
2.9 V
3.0 V
3.1 V
3.2 V
CODE
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
VOUT MIN VOUT MAX VOLTAGE VOLTAGE
CODE
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
VOUT MIN
3.250 V
3.349 V
3.447 V
3.546 V
3.644 V
3.743 V
3.841 V
3.940 V
4.038 V
4.137 V
4.235 V
4.334 V
4.432 V
4.531 V
4.629 V
4.728 V
4.826 V
4.925 V
MAX
VOLTAGE
1.450 V
1.550 V
1.650 V
1.750 V
1.850 V
1.950 V
2.050 V
2.150 V
2.250 V
2.350 V
2.450 V
2.550 V
2.650 V
2.750 V
2.850 V
2.950 V
3.050 V
3.150 V
1.550 V
1.650 V
1.750 V
1.850 V
1.950 V
2.050 V
2.150 V
2.250 V
2.350 V
2.450 V
2.550 V
2.650 V
2.750 V
2.850 V
2.950 V
3.050 V
3.150 V
3.250 V
2.5 V
2.6V
3.3 V
3.4 V
3.5 V
3.6 V
3.7 V
3.8 V
3.9 V
4.0 V
4.1 V
4.2 V
4.3 V
4.4 V
4.5 V
4.6 V
4.7 V
4.8 V
4.9 V
5.0 V
3.350 V
3.451 V
3.553 V
3.654 V
3.756 V
3.857 V
3.959 V
4.060 V
4.162 V
4.263 V
4.365 V
4.466 V
4.568 V
4.669 V
4.771 V
4.872 V
4.974 V
5.075 V
4.3 V
4.4 V
4.5 V
4.6 V
4.7 V
4.8 V
4.9 V
5.0 V
5.1 V
5.2 V
5.3 V
5.4 V
5.5 V
5.6 V
5.7 V
5.8 V
5.9 V
6.0 V
2.7 V
2.8 V
2.9 V
3.0 V
3.1 V
3.2 V
3.3 V
3.4 V
3.5 V
3.6 V
3.7 V
3.8 V
3.9 V
4.0 V
4.1 V
4.2 V
The output voltage table indicates the standard value when manufactured.
Page4
October 2001 TOKO, Inc.
TK717xxS
TEST CIRCUIT
V
IN
V
OUT
I
IN
A
C
= 0.22 µF
CL = 0.22 µF
IN
V
IN
V
GND
I
OUT
A
CONT
C
= 0.001 µF
V
N
CONT
I
V
On/Off C
ONT
Noise Bypass (V
)
REF
TYPICAL PERFORMANCE CHARACTERISTICS
NoisePerformance
TK71730S NOISE vs. C
N
NOISE vs V
NOISE vs. I
OUT
OUT
= 0.01 µF
300
CL = CERAMIC
70
65
C
N
♦
CL = 0.2 µF
CL = 0.4 µF
CL = 1.0 µF
CL = 2.2 µF
CL = 10 µF
I
= 30 mA
OUT
250
♠
70
60
C
= 0.01µF
N
♦
CL = 0.22 µF
CL = 0.47 µF
CL = 1.0 µF
CL = 2.2 µF
CL = 10 µF
CL = 1.0 µF (TANTALUM)
♦
♠
♠
60
55
50
45
40
35
200
150
50
40
30
CL = TANTALUM
CL = TANTALUM
100
50
0
♦
I
= 30 mA
OUT
BPF = 400 Hz ~ 80 kHz
BPF = 400 Hz ~ 80 kHz
20
10
♠
30
0
10
100 1000 10000 100000
(pF)
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
(V)
0
25 50 75 100 125 150 175 200
(mA)
C
N
V
I
OUT
OUT
NOISE vs. I
NOISE vs. FREQUENCY
OUT
= 0.01 µF
10
70
65
C
N
TK71730S
C
= 10 µF
For better noise reduction it is
more effective to increase CN
withoutincreasingCL.
The recommended CN capaci-
tance is 6800 pF or 0.01 mF.
As the output voltage increases,
the noise will also increase.
IN
CL = 0.22 µF (CERAMIC)
= 10 mA
CL = 0.22 µF
CL = 0.47 µF
CL = 1.0 µF
CL = 2.2 µF
CL = 10 µF
♦
♠
60
55
50
45
40
35
I
OUT
1
C
= 0.01 µF
N
CL = CERAMIC
C
= 0.10 µF
0.1
N
♦
♠
0.01
30
0.01
0.1
1
10
100
0
25 50 75 100 125 150 175 200
(mA)
FREQUENCY (kHz)
I
OUT
October 2001 TOKO, Inc.
Page5
TK717xxS
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
RippleRejection
TANTALUM CAPACITOR
MULTILAYER CERAMIC CAPACITOR
0
0
-10
-10
CL = 0.22 µF
-20
CL = 0.22 µF
Conditions:
VIN = 5.0 V
VOUT = 3.0 V
IOUT = 10 mA
VRIPPLE = 500 mVp-p
f = 100 Hz TO 1 MHz
CIN = 0 pF
-20
-30
-40
-30
-40
-50
-50
-60
-60
-70
-80
-70
-80
CL = 2.2 µF
CL = 2.2 µF
-90
-90
CN = 0.01 mF
-100
-100
0.1
1
10
100
1000
0.1
1
10
100
1000
FREQUENCY (kHz)
FREQUENCY (kHz)
The ripple rejection characteristic depends on the characteristic and the capacitance value of the capacitor connected to
the output side. The RR characteristic of 50 kHz or more varies greatly with the capacitor on the output side and the PCB.
Please confirm your expectations with your actual design, if necessary.
RR AT LOW VOLTAGE
RIPPLE REJECTION vs. I
OUT
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
C
= 0.01 µF
C
= 0.01 µF
N
N
CL = 0.22 µF (CERAMIC)
: 1, 50, 100, 150,
CL = 0.22 µF (Ceramic)
= 5.0 V
I
V
OUT
200 mA
IN
V
= 500 mVp-p
RIPPLE
I
= 200mA
OUT
Freq = 1 kHz
Freq = 400 Hz
I
= 1mA
OUT
V
= V
OUT
IN
+0.2 +0.4 +0.6 +0.8
- V _ (TYP) (V)
+1
0
25 50 75 100 125 150 175 200
(mA)
V
I
IN
OUT
OUT
MAXIMUM OUTPUT CURRENT
DROP OUT VOLTAGE
5.0
4.0
0
-50
-100
3.0
2.0
1.0
0.0
-150
-200
-250
-300
-350
0
100
200
300
(mA)
400
500
0
50 100 150 200 250 300
I
OUT
I
(mA)
OUT
Page6
October 2001 TOKO, Inc.
TK717xxS
DEFINITION AND EXPLANATION OF TECHNICAL TERMS
OUTPUTVOLTAGE(VOUT
)
mA. Ripple rejection is the ratio of the ripple content of the
output vs. the input and is expressed in dB.
The output voltage is specified with VIN = (VOUT(TYP) + 1 V)
and IOUT = 5 mA.
STANDBYCURRENT(ISTBY
)
MAXIMUMOUTPUTCURRENT(IOUT(MAX)
)
Standbycurrentisthecurrentwhichflowsintotheregulator
when the output is turned off by the control function.
Theratedoutputcurrentisspecifiedundertheconditionwherethe
output voltage drops 0.3 V below the value specified with IOUT
=
OVERCURRENTSENSOR
5 mA. This input voltage is set to VOUT(TYP) +1 V, and the current
is pulsed to minimize temperature effect.
The overcurrent sensor protects the device if the output is
shortedtoground.
DROPOUTVOLTAGE(VDROP
)
THERMALSENSOR
The dropout voltage is the difference between the input
voltage and the output voltage at which point the regulator
starts to fall out of regulation. Below this value, the output
voltage will fall as the input voltage is reduced. It is
dependentupontheloadcurrentandthejunctiontempera-
ture.
The thermal sensor protects the device if the junction
temperature exceeds the safe value (Tj = 150 °C). This
temperaturerisecanbecausedbyextremeheat,excessive
power dissipation caused by large output voltage drops, or
excessive output current. The regulator will shut off when
the temperature exceeds the safe value. As the junction
temperature decreases, the regulator will begin to operate
again.Undersustainedfaultconditions,theregulatoroutput
will oscillate as the device turns off then resets. Damage
may occur to the device under extreme fault conditions.
LINE REGULATION (Line Reg)
Line regulation is the ability of the regulator to maintain a
constant output voltage as the input voltage changes. The
line regulation is specified as the input voltage is changed
from VIN = VOUT + 1 V to VIN = VOUT + 6 V.
REVERSEVOLTAGEPROTECTION
LOADREGULATION(LoadReg)
Reverse voltage protection prevents damage due to the
outputvoltagebeinghigherthantheinputvoltage.Thisfault
condition can occur when the output capacitor remains
chargedandtheinputisreducedtozero,orwhenanexternal
voltagehigherthantheinputvoltageisappliedtotheoutput
side. Toko’s regulators do not need an inherent diode
connected between the input and output.
Load regulation is the ability of the regulator to maintain a
constant output voltage as the load current changes. It is a
pulsed measurement to minimize temperature effects with
theinputvoltagesettoVIN =VOUT +1V. Theloadregulation
isspecifiedundertwooutputcurrentstepconditionsof5mA
to 100 mA and 5 mA to 200 mA.
QUIESCENTCURRENT(IQ)
Thequiescentcurrentisthecurrentwhichflowsthroughthe
ground terminal under no load conditions (IOUT = 0 mA).
V
IN
V
OUT
TK717xxS
GND
RIPPLE REJECTIONRATIO (RR)
Ripplerejectionistheabilityoftheregulatortoattenuatethe
ripple content of the input voltage at the output. It is
specifiedwith200mVRMS,400Hzand1kHzsuperimposed
on the input voltage, where VIN = VOUT + 1.5 V. The output
decoupling capacitor is set to 1.0 µF, the noise bypass
capacitor is set to 0.01 µF, and the load current is set to 10
October 2001 TOKO, Inc.
Page7
TK717xxS
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
PACKAGEPOWERDISSIPATION(PD)
The range of usable currents can also be found from the
graphbelow.
This is the power dissipation level at which the thermal
sensor is activated. The IC contains an internal thermal
sensorwhichmonitorsthejunctiontemperature. Whenthe
junction temperature exceeds the monitor threshold of
150 °C,theICisshutdown.Thejunctiontemperaturerises
asthedifferencebetweentheinputpower(VIN xIIN)andthe
output power (VOUT x IOUT) increases. The rate of tempera-
ture rise is greatly affected by the mounting pad configura-
tion on the PCB, the board material, and the ambient
temperature. When the IC mounting has good thermal
conductivity,thejunctiontemperaturewillbelowevenifthe
power dissipation is great. When mounted on the recom-
mendedmountingpad,thepowerdissipationoftheSOT23-
5 is increased to 500 mW. For operation at ambient
temperatures over 25 °C, the power dissipation of the
SOT23-5 device should be derated at 4.0 mW/ °C. For
operationabove25°C:Todeterminethepowerdissipation
forshutdownwhenmounted,attachthedeviceontheactual
PCB and deliberately increase the output current (or raise
the input voltage) until the thermal protection circuit is
activated. Calculate the power dissipation of the device by
subtracting the output power from the input power. These
measurementsshouldallowfortheambienttemperatureof
the PCB. The value obtained from PD /(150 °C - TA) is the
derating factor. The PCB mounting pad should provide
maximum thermal conductivity in order to maintain low
device temperatures. As a general rule, the lower the
temperature, the better the reliability of the device. The
thermalresistancewhenmountedisexpressedasfollows:
PD(mW)
3
P
D
6
D
PD
4
5
25
50
75
(°C)
150
T
A
Procedure:
1) Find PD
2) PD1 is taken to be PD x (~0.8 - 0.9)
3) Plot PD1 against 25 °C
4) ConnectPD1 tothepointcorrespondingtothe150°Cwith
a straight line.
5) In design, take a vertical line from the maximum
operating temperature (e.g., 75 °C) to the derating curve.
6) Read off the value of PD against the point at which the
vertical line intersects the derating curve. This is taken as
the maximum power dissipation, DPD
.
The maximum operating current is:
IOUT = (DPD / (VIN(MAX) -VOUT
)
Tj = 0jA x PD + TA
For Toko ICs, the internal limit for junction temperature is
150 °C. If the ambient temperature (TA) is 25 °C, then:
150 °C = 0jA x PD + 25 °C
0jA = 125 °C / PD
0jA = 125 °C / PD (°C / mW)
PD is the value when the thermal protection circuit is
activated. A simple way to determine PD is to calculate VIN
xIIN whentheoutputsideisshorted.Inputcurrentgradually
falls as temperature rises. You should use the value when
thermal equilibrium is reached.
Page8
October 2001 TOKO, Inc.
TK717xxS
APPLICATION INFORMATION (CONT.)
BOARDLAYOUT
V
OUT
V
IN
+
+
GND
NOISE
BYPASS
ON / OFF
SOT23-5BOARDLAYOUT
PD(mW)
500
-4.0 MW / °C
Mounted as shown
Free Air
0
100
25
50
150 °C
0
(85)
October 2001 TOKO, Inc.
Page9
TK717xxS
APPLICATION INFORMATION (CONT.)
INPUT-OUTPUTCAPACITORS
Linearregulatorsrequireinputandoutputcapacitorsinordertomaintaintheregulator’sloopstability.Theequivalentseries
resistance(ESR)oftheoutputcapacitormustbeinthestableoperationarea. However, itisrecommendedtouseaslarge
a value of capacitance as is practical. The output noise and the ripple noise decrease as the capacitance value increases.
The IC is never damaged by enlarging the capacitance.
ESRvaluesvarywidelybetweenceramicandtantalumcapacitors. However, tantalumcapacitorsareassumedtoprovide
more ESR damping resistance, which provides greater circuit stability. This implies that a higher level of circuit stability
can be obtained by using tantalum capacitors when compared to ceramic capacitors with similar values. The IC provides
stable operation with an output side capacitor of 0.22 mF (VOUT ³ 2.0 V). If the capacitor is 0.1mF or more over its full range
of temperature, either a ceramic capacitor or tantalum capacitor can be used without considering ESR (VOUT ³ 2.0 V).
For output voltage device ³ 2.0 V applications, the recommended value of CL ³ 0.22 mF.
For output voltage device ³ 1.5 V applications, the recommended value of CL ³ 0.47 mF.
For load current £ 0.5 mA, increase the output capacitor to 1 mF.
V
OUT
The input capacitor is necessary when the battery is discharged,
the power supply impedance increases, or the line distance to the
power supply is long. This capacitor might be necessary on each
individual IC even if two or more regulator ICs are used. It is not
possible to determine this indiscriminately. Please confirm the
stability while mounted.
C
= 0.22 µF
IN
CL = 0.22 µF
C
= 0.01 µF
N
STABLE OPERATION AREA vs. VOLTAGE, CURRENT AND ESR
V
OUT
= 4.0 V
V
OUT
= 1.5 V - 1.9 V
V = 2.0 V
OUT
V
OUT
= 3.0 V
V
OUT
= 5.0 V
100
10
100
10
100
10
100
100
10
10
STABLE AREA
CL = 0.1 µ F
STABLE AREA
CL = 0.1 µ F
STABLE AREA
CL = 0.1 µ F
STABLE AREA
CL = 0.1 µ F
STABLE AREA
CL = 0.1 µ F
1
1
1
1
1
0.1
0.1
0.1
0.1
0.1
0 .01
0 .01
0 .01
0 .01
0 .01
0
50
100
150
0
50
100
150
0
50
100
150
0
50
100
150
0
50
100
150
I
(mA)
I
(mA)
I
(mA)
I
(mA)
I (mA)
OUT
OUT
OUT
OUT
OUT
All Stable
All Stable
CL ≥ 1.0 µ F
CL ≥ 0.22 µ F
Please increase the output capacitor value when the load current is 0.5 mA or less. The stability of the regulator improves
if a big output side capacitor is used (the stable operation area extends).
Forevaluation KYOCERA CM05B104K10AB, CM05B224K10AB, CM105B104K16A, CM105B224K16A,CM21B225K10A
MURATA
GRM36B104K10, GRM42B104K10, GRM39B104K25, GRM39B224K10, GRM39B105K6.3
Page10
October 2001 TOKO, Inc.
TK717xxS
APPLICATION INFORMATION (CONT.)
BiasVoltageandTemperatureCharacteristicsofCeramicCapacitors
Generally, a ceramic capacitor has both a temperature characteristic and a voltage characteristic. Please consider
both characteristics when selecting the part. The B curves are the recommended characteristics.
CAPACITANCE vs. TEMPERATURE
CAPACI TANCE vs. BI AS VOLTAGE
100
90
100
90
B CURVE
B CURVE
80
70
80
70
F CURVE
F CURVE
60
50
60
50
40
0
2
4
6
8
10
-50
- 25
0
25
Ta(°C)
50
75
100
Bi as Vol t age (V)
October 2001 TOKO, Inc.
Page11
TK717xxS
APPLICATION INFORMATION (CONT.)
As shown in the figure below, several components are required to discharge the charge in the output side capacitor in a
typicalregulator.
V
V
OUT
IN
DISCHARGE CIRCUIT
On/Off Control
TK717xxS (TOKO REGULATOR)
Doesn’t need discharge circuit
BecausetheexternalelectricaldischargecircuitisunnecessarywiththeTK717xxS, theapplicationbecomesverysimple.
Turning the regulator off automatically discharges the charge of the output side capacitor.
DISCHARGE CURRENT IN OFF MODE
V
OUT
V
IN
On/Off CONTROL
The TK112xxB is a normal regulator.
The TK717xx is built with the automatic discharge circuit during off time.
The TK716xxS, AS is built with the output disconnect circuit.
As shown here:
on
off response: CL = 2.2 µF
C
= 1000 pF I Load = 0mA
N
CONTROL
TK716xxS, AS
TK112xxB
V
OUT
TK717xx
0
200
400
TIME(µS)
600
Page12
October 2001 TOKO, Inc.
TK717xxS
PACKAGE OUTLINE
MarkingInformation
SOT23-5
Product Code
Part Number
TK71715
TK71716
TK71717
TK71718
TK71719
TK71720
TK71721
TK71722
TK71723
TK71724
TK71725
TK71726
TK71727
TK71728
TK71729
TK71730
TK71731
TK71732
TK71733
TK71734
TK71735
TK71736
TK71737
TK71738
TK71739
TK71740
TK71741
TK71742
TK71743
TK71744
TK71745
TK71746
TK71747
TK71748
TK71749
TK71750
K
Voltage Code
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
0.7
5
4
Marking
x
x
K
Voltage
Code
Product
Code
e
e
0.95
0.95
e
2
3
1
1.90
0.4 ±0.1
Recommended Mount Pad
e
e
0.95
0.95
0.1
M
2.9
1.6
2.8 ±0.3
0.1
48
49
50
Dimensions are shown in millimeters
Tolerance: x.x = ± 0.2 mm (unless otherwise specified)
Toko America, Inc. Headquarters
1250 Feehanville Drive, Mount Prospect, Illinois 60056
Tel: (847) 297-0070 Fax: (847) 699-7864
TOKO AMERICA REGIONAL OFFICES
Western Regional Office
Toko America, Inc.
Midwest Regional Office
Toko America, Inc.
Semiconductor Technical Support
Toko Design Center
2480 North First Street , Suite 260
San Jose, CA 95131
Tel: (408) 432-8281
1250 Feehanville Drive
Mount Prospect, IL 60056
Tel: (847) 297-0070
4755 Forge Road
Colorado Springs, CO 80907
Tel: (719) 528-2200
Fax: (408) 943-9790
Fax: (847) 699-7864
Fax: (719) 528-2375
Visit our Internet site at http://www.tokoam.com
The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture of its
products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of
third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc.
October 2001 TOKO, Inc.
Page13
© 1999 Toko, Inc.
IC-216-TK716xx
0798O0.0K
Printed in the USA
All Rights Reserved
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